Enable maximize mode when keyboard is open past 180 degrees.

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index 3f0841a0f2556a176e3963e6212691b00e1d1e79..40c9d8e36c9778ae081d4843a2ec798297138670 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -130,6 +130,7 @@ class KeyboardUMAEventFilter;
 class LastWindowClosedLogoutReminder;
 class LocaleNotificationController;
 class LogoutConfirmationController;
+class MaximizeModeController;
 class MaximizeModeWindowManager;
 class MouseCursorEventFilter;
 class OutputConfiguratorAnimation;
@@ -505,6 +506,10 @@ class ASH_EXPORT Shell
     return accelerometer_controller_.get();
   }
 
+  internal::MaximizeModeController* maximize_mode_controller() {
+    return maximize_mode_controller_.get();
+  }
+
 #if defined(OS_CHROMEOS)
   // TODO(oshima): Move these objects to DisplayController.
   ui::OutputConfigurator* output_configurator() {
@@ -732,6 +737,8 @@ class ASH_EXPORT Shell
 #endif  // defined(USE_X11)
 #endif  // defined(OS_CHROMEOS)
 
+  scoped_ptr<internal::MaximizeModeController> maximize_mode_controller_;
+
   // |native_cursor_manager_| is owned by |cursor_manager_|, but we keep a
   // pointer to vend to test code.
   AshNativeCursorManager* native_cursor_manager_;